Brownsville Air Quality in 2024
In 2024, Brownsville's air quality (Brownsville-Harlingen, TX area) had a median daily AQI of 61 (Moderate) across 366 monitored days. 61 days (16.7%) reached Unhealthy for Sensitive Groups or worse, 99 were Good, and the year's peak AQI was 171 (Unhealthy). Fine particulate matter (PM2.5) set the daily AQI on 322 of those days. The cleanest month of 2024 was August (median AQI 47, 0 days above 100) and the worst was May (median 124, 24 days above 100, peak 171).
- Good: 27.0%
- Moderate: 56.3%
- Unhealthy for Sensitive Groups: 13.1%
- Unhealthy or worse: 3.6%
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How was Brownsville's air quality in 2024?
Moderate on a typical day: median AQI 61, with 61 days above AQI 100 out of 366 monitored — the 7th cleanest of 7 years on record for the area.
- ✓Peak AQI in 2024: 171 (Unhealthy).
- ✓Fine particulate matter (PM2.5) was the main pollutant on 322 days.
- ✓Cleanest month: August; worst: May.
Frequently asked questions
What was the average AQI in Brownsville in 2024?▾
EPA's Air Quality System puts Brownsville's (Brownsville-Harlingen, TX) median daily AQI for 2024 at 61, which is Moderate. 61 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 171.
Which month had the worst air quality in Brownsville in 2024?▾
The cleanest month of 2024 was August (median AQI 47, 0 days above 100) and the worst was May (median 124, 24 days above 100, peak 171).
Was 2024 a good or bad year for Brownsville's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 7th cleanest by days above AQI 100 — the worst year on record here. 2024's median of 61 is above the area's typical annual median of 52.
Brownsville month by month in 2024
Brownsville air quality month by month, 2024 (Brownsville-Harlingen, TX, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 60 | 2 | 120 | PM2.5 |
| February | 29 | 56 | 4 | 117 | PM2.5 |
| March | 31 | 74 | 6 | 139 | PM2.5 |
| April | 30 | 86 | 12 | 157 | PM2.5 |
| Mayworst | 31 | 124 | 24 | 171 | PM2.5 |
| June | 30 | 65 | 8 | 157 | PM2.5 |
| July | 31 | 60 | 2 | 118 | PM2.5 |
| Augustcleanest | 31 | 47 | 0 | 64 | PM2.5 |
| September | 30 | 45 | 2 | 152 | PM2.5 |
| October | 31 | 59 | 0 | 96 | PM2.5 |
| November | 30 | 63 | 1 | 101 | PM2.5 |
| December | 31 | 55 | 0 | 94 | PM2.5 |
How 2024 compares
Among the 7 years EPA has published for the area (2019–2025), 2024 ranks 7th cleanest by days above AQI 100 — the worst year on record here.
2024's median of 61 is above the area's typical annual median of 52.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Brownsville
The latest EPA AirNow observation puts Brownsville's AQI at 47 (PM2.5). The figures above are multi-year annual statistics, not today's reading.
View current Brownsville air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Brownsville-Harlingen, TX), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.